Fall Equinox 2024 Usa. The name equinox comes from the latin aequus (equal) and nox (night). In 2024, the last day of summer in the northern hemisphere is september 22!
The fall equinox is on sunday september 1, 2024 to saturday october 5, 2024. See see our 2024 fall foliage color map to get an idea of when fall leaves change their color.